Vacuum cleaner



VOct. 11, 1938, o..Ho| M-HANSEN VACUUM CLEANER Filed Deo wlw @MAQS nu` l1d, ma

' ed within the casing.

Patented Oct. 11, v1938 I UNITED STATI-:s

PATEN'r OFFICE VACUUM CLEANER New York- Appueetien December 5, 193s,serial No. '114.404

v 4 Claims.

The present invention relates to vacuum cleaners.

The object of my invention is to provide an improved construction andarrangement for vacuum cleaners in which the space occupied by the bagis decreased. e

In the accompanying drawing, Fig. 1 is a perspective view of a vacuumcleaner embodying my invention; Fig. 2 is fa top plan view of thecentrifugal separator used in the cleaner; Fig. 3 is'a sectional viewtaken on line 3-3 of Fig. 2; Fig. 4 is' a sectional view taken ontheline 4-4 of Fig. 3; Fig. 5 is a sectional view taken on line 5 5 ofFig. 1; Fig. 6 is a view showing Vthe method of making the bag; andFig.A 7 is an'enlarged fragmentary sectional view taken on line 1-1 ofFig. 6.

Referring to the drawing, I have shown my invention applied tol a vacuumcleaner having a casing I which is supported on front and rear.supporting wheels 2. At the front of the casing is a suction nozzle 3through which all" is drawn by means of an electric motor driven fanmount- The air is discharged through a discharge outlet 4. A handle 5carried by a fork 4I pivoted on the casing is used 'to\ move the cleanerover the surface beingi cleaned.

The dust-laden air discharged i'rom the outlet 4 is conducted bymeans ota flexible conduit 1 to the inlet 8 of a centrifugal separator containedwithin a casing 9. The inlet 8 discharges the air tangentially withinthe casing, producing a whirling annuls of air within the .casing whichcentrifugally separates the dust from the air. Air is discharged fromthe casing through whirling air, indicated by arrows i2, issuch that theair must turn through an angle greater than degrees in order to passthrough the slots 'I|i.- Particles ofdirt suspended in the air enteringthe slots Ill have a tendencyto be thrown outward as the-.air is makingthe necessary sudden change in direction. The'slots therefore assist inthe separation of the dust from `the air. The lower end ofthe tubularmember 'ii -is closedV by a baille plate I3 which provides a relativelynarrow passage il between outer edges and side walls ofthe casing 9.' edust carried by the whirling air has a tendency to move toward the sidewalls of the casing and a considerable portion'of the dust will fall.through Athe passage I4 into the space belowthe bathe I3. 'I'he spacebelow thebaiile I3 is protected by thebaiile from rapidly whirling airand the dust therefore tends to settle more readily in this space. Thebottom'of the casing 9 is closed by a hinged plate I5which is heldagainst a gasket IB on the lower edge of the' casing by 5 by means ofbrackets I8. The centrifugal sepa' 1 rator is particularly effective inseparating the heavy particles of dirt from the air. The tubular -memberII which conducts the air from the centrifugal separator is connectedthrough a co'upliug i9 to the lower end of a vacl uum cleaner bag 20.The construction of the vacuum cleaner bag isv clearly shown in Figs. 5,\6 and 7. It comprises two sheets of fabric'i and 22 which arestltchedtogether around their outside edges and connected to thecoupling I9 .2

in the same manner as the conventional vacuum cleaner bag. The sheets 2iand 22 are stitched together along lines 23 extending from the upper vend oi' the bag to points near the lower end of the bag. This stitchingprovides a pluralityjoi' 25 tubular passages 24 which communicate ahead- -er portion 25 between the coupling I9 and the lower ends of thepassages. In the assembly of the bag-the outside edges 2i.- and 21 arestitched together so that the bag-is in the form of lan 3 0 annulus. Thebag is then slipped .over the vacuum cleaner handle and the couplingIlis connected to the member II. The bag is supported on the handle bymeans of a cord 28 extending between a ring 2l von the handle 35' and atab 30 on the-upper endof the bag.

With this construction the'bag has a large lterlng surface, but due 'tothe fact that the walls, of the bag are inthe form of tubular pase sagesthe space occupied by the bag is smal1.'40 The space requirementsv Aofthe cleaner are iurther decreased by arranging thebagso that itencircles the vacuum cleaner handle. This bag is of particular utilityinconnectionwith vacuum cleaners having` centrifugal separators. 5Centrifugal separators are primarily effective in separating the heavyparticles of dust from the air. Some of the'lighter particles arecarried in the air 'discharged from the separator and someformof'illteris therefore desirable for separating .these lighterparticles of dust from the air. 'I'lie bag illustrated -ls verysatiaetory' for this function since itgprovides a large fllteringsuriaeewhich r'equire-cleaningat -ina 1. A vacuum cleaner bag havinginner and outer annular fabric Walls, said inner wall adapted to form acentral passageway open at both ends whereby the bag may be arrangedaround a vacuum cleaner handle, an opening in one end of said bagadapted to be connected to the discharge outlet of a vacuum cleaner, andmeans fastening the walls together for providing a plurality of tubularpassages and a header communicating with said opening for dischargingair to said passages.

2. A vacuum cleaner bag having inner and outer walls joined at theiredges and adapted to form an open ended central passageway, meansfastening the walls at other than-their edges for providing a pluralityof tubular passages and a header, and an opening in said header adaptedf1. A vacuum cleaner bag comprising a pluwhich is adapted to be wrappedaround the 20 handle of said vacuum cleaner.

OSMUN'D HOLM-HANSEN.

